# A012755 (b-file synthesized from sequence entry)
0 0
1 2
2 0
3 400
4 2688
5 1631488
6 60938240
7 35243972608
8 3826154307584
9 2477263324839936
10 571708399442198528
11 435722170330996801536
12 177081722613295659089920
13 162107313371111569999527936